Line oiler



M. O'FARRELL July 22, 1952 LINE OILER Filed Jan. 29, 1950 I INVENTOR rays/r 0 4192544.

7 ATTORNEY 1. gr F u q mm v 7 v 67 H iUL ceases.

easily serviced.

Patented July 2 2,

' Matthew OFarrell; Detroit;?Mic h assign orv T .Chicago Pneumatic Tool'Company, NewYork,

N. Y., a corporation of New Jersey "Applicationjianuary 28, 1 950, Serial No. 141,073 3 This invention relates to lubricating devices and more particularly to a line oiler for use in air lines of air operated tools and; devices.

Briefly, the invention comprises: a container surrounding a conduit or pipe which can be connected to an air line so that the air stream passes therethrough. A collapsible lubricant reservoir is arranged within the volume formedbetween the container and pipe. The'pipe has a Venturi-like V restriction at the mid-portion; and a needle valve,

arranged in the region of the restriction. is operable to allow lubricant to pass from the reservoir through an'ape'rtureto the air stream. A paddle shaped lever positioned within the pipe, is adapted to move the needle valve to 'open' position when air is passing throughthe pipe. Full line pressure is maintained on the exterior surface of the reservoir at all times. A compression spring is' arranged to. keep the needle valve in closed position when air flowceases. The Venturi-like restriction causes a decrease in air pressure at the reservoir aperture during air flow, and since full line pressure is maintained on the exterior surface 'of the reservoir, the lubricant within the reservoir is subjected to a pressure differential which assures positive flow of lubricant to the air stream duringflow through the p p w An object of the invention is to provide a line oiler in which a positive addition of lubricant to the air stream, is assured during air flow therethrough. Another object is to provide a line oiler in which the flowof lubricant from the reservoir is positively cut oil when the air flow A further object or the invention is to provide a line oiler which will operate efliciently in any position of use. Further objects are the provision of a line oiler which is simple in structure and with few moving parts, reliable in operation, conveniently installed, and which is These and further objects and features of the invention will be apparent from the following Fig. 1 is a longitudinal section of an embodiment of the invention;

scams. (Crist -Tami."

Fig. 2 is a cross section as seen from line 2-2 on the pipe, the other end of the casing being afilxed to an end plate I4 which is supported by the=pipe and in abutting relationship with another fiang'e 15 formed on the pipe. A gasket l6 iscompressively maintained between the end plate l4 and'flang'elE to form a liquid tight joint thereb-etween. Each end of thepipe l2 extends beyond the: casing H and is threaded at I! so that' the oiler l0 may be'connected'into an air line leading to the'tool or-"device being supplied. At the inner mid-portion of pipe 12 is-a Venturilike restriction [8, having a tapered valve seat l9- and aperture 20 arranged in theregion of minimum diameter.

-A needle valve 2| positionedfltransverse to the axis of the pipe l-2,-'has a tapered end 22 which seats in the valve seat 19 to close 'aperture 20, the other end of the valve 2| being slidably engaged within a'bore 23 of a guide nut 24, positioned in the Wall of pipe I! opposite the aperture 20. A spring 25 surrounding a portion of the valve body is compressively maintained to urge the valve toward seated position. Positioned within the pipe I2 isa valve operating element 26, which is somewhat L-shaped, one. leg 21being flat and having a substantial area, the other leg 28 being forked to engage a shoulder 29 formed 'on thevalve 2!. The valve operating elementjfi "is pivotally mounted upon a pin 3| which is positioned transverse to the axis of the pipe l2.

It will be seen that when the air stream passes through -thepipe ,l2 in the direction as indicated by the arrows'in Fig. '1, the leg 21 acts as a vane Qwh'erebythe valveoperating element 2 6 will be caused to rotate clockwise about the pin'3l, as a resultof which the valve 2| will be lifted upwardly whereby it will be unseated and aperture 20 will be opened.

. Surrounding the pipe" [2 and enclosedwithin container H,.'is a corrugated cylindrical reservoi'r '32, preferably'made of a resilient oil resistant material such "as thatknown to the trade fasiDiiprene. j'Ifhe ends of.,the reservoir'32 are afiixed to the ,fianges .,l3 and I5 ofpipe [2 in fluid tight manner by means of .wire retainers 33. A reservoir filling holetfh'aving'a pipe plug 35 is arranged in the flange 13 as shown. Also located in flange I3, is a passageway 36 which extends from the interior of the pipe I2 to, the region exterior of the reservoir 32 to maintain line pressure on the reservoir at all times that air is in the line.

When air begins to pass through the line oiler at commencement of tool operation, the valve operating element 26 is rotated, as heretofore explained, and the needle valve 2| is lifted, thereby uncovering 'ap'erture'ZD. Lubricant thereupon passes from the reservoir 32-to the air stream, the passage of lubricant being positive and steady reservoir 32, rand the reduced pressure'which like restriction l8. long as live air flow con thereservoir 32 .will be added to the air flow. Immediately upon cessation of air flowfspringzfi will return the needle valve2=l to closed position,

tion as shown in Fig. 1.

q e; r i cut-e f f ew the line oiler'as, i th ase m 1 p o d v ces-r As: t e u y of use, the Wall of the reservcir willj be forcedifnreservoir fl h-is serves a; twofold purpose, Ila-r eav reservoir, and te -maintain the t a is, claimed I duit extending; throngh [the container, a' col-- lapsible lubricant reservoir arrangedF'Wi-thin,the

ps iaenea the conduitiand operable to "admitlubricant irom the reservoir into the (ion duit, avalveoperating element arranged withe the conduit and responsive to the flow-of flive conduit the @regio'n 'of, the needle y wj provide a pressure differential on lubricant with I in the rservoirl'dui ing flive air flow; to the eby. assur the admittance or Ylubricant to-th con-L ,2; A li fiil'er comprisingfa container, a condiiitfexte'nding'through the -.conta'iner and in-f 1 ranged withinl the container exteriorto the concurt; aine'eme sal e located transversely "Within the conduit an operable to .admitflubricant from the reservoir into/the conduit; "a valve operatneedle valvefresilien'tf' 'n'i'eans adaptedto-resist movement of the needle valve tooperabl'e pos'ie tion, and means including a 'venturi like, re'-' lubricant'to the "conduit;

due to the pressure differential caused by the line pressure acting on- Vthe' exterior surface of the exists at jthe aperture byvirtu of the Venturi- V T tinues throughthe pipe theneedle valvegyillbe 1 0 maintained in open-position and lubricant from and all moving parts will. assume original posil5 At the same time the air pressure on the reservoir 32 drops with the live pressu e'in pipe l2. It isapparent therefore thattheregcari be I; no flood of oil into the gpipe when the supply of ican w h n th -rr ir s ecre d up ni war-div d h ip 2- v eser heli'a 520 line pressureacting cn @theimtersurface of the.

to e im eatew pre a e wi h h lubricant 1. A line oiler cc m-prisinga conta ner, a 115.

ccntainerexterior .to the conduit; a needlevalve I i -sliding} "means, .at' each end Iforf corine'ction'ltoia a live air line, acolla'p'siblelubricant. reservoir aring element arranged within the cjonduitiaiid V responsive to the new of live air 'tofoperate the v striction formed in the conduit and a'p'ais'sageway 7531571 'air flow' tofthereby a'sure. the admittance "of 5 jj' 3. A line oiler comprising a container, a conduit extending-through the container and including means at each end for connection to live air line, said conduit having a pair of spaced flanges enclosed by the container, a corrugated containe'ntheendsofthe rem; affixed to the flanges in liquid tight manner, a needle valve located transversely within the conduit, 1

one end of the needle valve being tapered and adapted in closed position to seat in an aperture which connects the reservoir and the conduit, the other end of which slidably engages a guide nut arranged in the wall of the conduit, a valve :op'erating'element located in the conduit compriSingTaYrflfiShaped paddle, one leg of which has a flat surface arranged crosswise to the axis ofitheconduit;the'other leg being forked and engaging a shoulder formed on the body of the needle valve, said valve operating element re- 1 sponsiveto the flo v'v or live air to unseat the needle valve ntf means arranged to urge .i d v o. 'to'pprovide-a pressure differential on thelubricant w hin the reservoir during live air flow, includ- H like restriction formed in the H v v n=onedf.flanges, one eind oi the 2 passagewm pening on the inner surface of the conduitfthe other e'nd'opening in aIregion resthe res'ervoiributinterior "to the conter'ior ta! taineri igznwune oni ccerdisg'ito time wherein 1 r and xtending about the'c'ondui't, a'valve means Taliito operate. the needle valve, and means; v in- 1140: eluding aYent-uri-like restriction formed in the positioned in theconduit including a vrec'iprocable 4 niemberhaving a tapered end :for' seating gm a Ztaperedaperture' which forms a means of egress forilubricant fiblifl the reservoir to the inside of the conduit and an air ,flow responsive means si eh't grr'reansl urging rthe re'ciprocable member rid the tapered-aperture, 'andfmea'ns'to pm- 'a pressure differential on lubricant Within Y l resenvoir during air flow through the conuit.

arshness 'IGITED tees STATESrPNifiiiis t i I? a. a :"D t i r. ea-1 930 resilient lubricant reservoir arranged withinthe seatedipofsition, and meansw' cih-ity lof the -needle valve, and

movement of the' 'reciprocable member; re- 

